hope this helps. spencer graves
Douglas Bates wrote:
Contributions of code to provide alternative calculations of denominator degrees of freedom are welcome :-)
I think it would be good to bear in mind that the use of the t and F distributions for models with mixed effects is already an approximation. If your design is such that you end up with a very few denominator degrees of freedom then the whole question of whether you should be using F or t distributions in the first place becomes problematic. If the number of denominator degrees of freedom is moderate than the distinction between alternative methods becomes unimportant.
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